The already existing grocery store is located at point (-2, -4).
The first entry (on the left, i. e., -2) represents the horizontal (west-east) value on the coordinate grid. While the second entry (on the right, -4) represents the vertical (south-north) value on the coordinate grid:
Then, after moving 5 blocks to the east (right), the horizontal coordinate of the additional grocery store will be:
-2 + 5 = 3
And after moving 3 blocks to the north (up), the vertical coordinate of the additional grocery store will be:
-4 + 3 = -1
So, the coordinates of the additional grocery store will be (3, -1). Plotting this point, we obtain: