It is really hard to tell from those pictures, or any picture to be honest. However, looking that photo I think you are a tadd nock low now. I would lower my rest slightly, like until the arrow shaft covers the holes in the riser or the bottom of the arrow is flush with the bottom of the hole.

Then go shoot it and see how it tunes. If you have the choice nock high is ALWAYS better than nock low.

Also if you get the loop ends to tight against your nock it will cause nock pinch and your arrow may pull to one side when you draw. If this happens to you spread your loop out a little bit.

Paul