The problem asks for the $y$-coordinate of point $F$ on the coordinate plane.

1. Problem Description

The problem asks for the $y$-coordinate of point $F$ on the coordinate plane.

2. Solution Steps

To find the $y$-coordinate of point $F$, we look at the vertical position of point $F$ on the graph. Point $F$ is located at $x=5$ and $y=5$.

Thus the $y$-coordinate of point $F$ is $5$.

3. Final Answer

5