The description indicates that the pitcher is looking to release the pitch level with the ground and in the direction he is facing. To achieve this, he should release the pitch at point Y.
In the given illustration, point Y is located above the pitcher (considering the pitcher's orientation), and releasing the pitch at this point would ensure that the ball is released at the highest point of the windup and is level with the ground. This is crucial for maintaining accuracy and control over the pitch's trajectory.