1. The problem asks for the coordinates of point C on the given polygon. 2. From the graph description, the coordinates of the vertices are given explicitly. 3. Point C is located at the coordinates (6, 8). 4. This means point C is 6 units along the x-axis and 8 units up the y-axis. 5. Therefore, the coordinates of point C are $\boxed{(6, 8)}$.