Which point of view does the narrator use in the passage?
The exterior of Quality Orthotics and Prosthetics does nothing to lift my mood, but the instant we go inside, Chloe certainly does.
"Jessica!" she says from behind the counter. "Are you excited?"
I can't help but smile, because she sure seems to be. "I guess," I tell her.

First person POV is characterized by the words "I, we." It is the way one would tell a story about themselves, telling about the things they thought, felt, and did; the narrator is a part of the story. You can tell from the repeated use of the word "I".

Second person POV is characterized by the word "you." It is someone talking about the reader, which is you, telling you the story. For instance, "you walk up the stairs, and you shudder as the stairs creak."

Third person POV is characterized by the words "he, she, it, they." This is when the narrator is speaking about other individuals, not themselves; the storyteller is outside of the story, just spectating on what is happening. Now, the third person POV has two subdivisions:

limited (when the character telling the tale can only relay the information they know is true and what they see - imagine yourself watching a movie for the first time and explaining the action to someone who has no idea what you're talking about and is not watching the movie with you. Since this is the first time you're seeing the film, you don't know why characters do certain things or what they are thinking, unless it's specifically said, so you have to rely on what characters say and do. An example of this narration is found in The Giver by Lois Lowry and Harry Potter and the Philosopher's Stone (or Sorcerer's Stone) by J. K. Rowling.)
omniscient (when the narrator is outside the story but knows how all the characters feel, what they think, what their motivations are, etc. An example of this narration style can be found in The Book Thief by Markus Zusak, Little Women by Louisa May Alcott, and Lord of the Flies by William Golding.)