Some of it you may be able to see without shooting it. Nock an arrow and eyeball it.....Is the arrow in line w/ the string? Is the arrow level when on the rest? If the answer to either of those is "No" it is out of tune.

Ok, now shoot it. Do your arrows fishtail or pourpoise? If the answer to either of those is "Yes" it is out of tune.

If that looks good, head to the shop. Shoot some. How are they stuck in the wall? Straight? Pointed up, down, left, right? Keep in mind here that depending on what material your shop uses for the wall that may be NO indicator what so ever. The arrow will take the path of least resistance which may cause it to be cockeyed in the wall.

Shoot through paper. Do you have a perfect bullet hole? If not, something is wrong. It may be your form, your grip, the bow or both.