A couple things come to my mind because I used to be one that was shooting too short.

1'st thing is your bow arm shoulder isn't able to relax,it should be relaxed and not pushed up against you.

2'nd thing is your elbow on your release hand should be straight back and not pointed out to the side.This will cause left and right problems.

3rd thing is your bow arm should be able to be extended almost completely out without having to bend your elbow.If you have to bend your elbow you need very little bend,more of just a relaxing bend and not a full bend.Hope that make sense.A little bend might be best for hunting due to clothing and maybe even some of the odd shots you may encounter might be easier with a slight bend.



When all of the above are right you can stand erect and without moving your head.Pull the bow back and the string will run across the tip of your nose and the corner of your mouth without moving anything out of wack.These are the most widely used anchor points but some will vary.
Hope this helps.