You should draw back to a solid consistant anchor point. THEN you should put your peep at the proper height to allow you to see through your string.

The peep is WHERE it is, because your eye is a certain height above your anchor point.

If you only lower your bow arm and tilt your head down, the entire geometry of the sight system changes. You need to move your head and bow arm around the same pivot point. Bending at the waist provides the best practicalcommon pivot point for your head and bow arm. If you don't bend at the waist, youlower your bow arm around a different pivot than your lower your head, and when you do that, all the angles change if you were to draw the sight lines out on a sheet of paper.