The answer is 3N is the net force, and the direction is right.
If you add 7, 6, and 4 together, you'll get 17.
If you add 9 and 5 together, you'll get 14.
17 - 14 = 3, so the answer for the net force is 3N.
Since the net force is going in the right direction, the answer is right.
