Try to think of it this way. At full draw, we ideally want our bow arm to be 90 degrees to the torso/spine. (The archery "tall T" or the "magic 90*). So if you draw so that you have the 90* angle and maintain it for the shot, IF the shot is lower than your shoulder, you try to maintain the 90* angle and move the entire body to adjust.
Most of the time for most folks just "tilting" our upper body forward will do the trick. For others bending the forward leg works and still for others moving the pelvis away from the target works. You have to play with it to find your approach.
MAINTAIN the 90 degree angle bow arm to body!
Arne