Adjusting.... Inch off on back right side

Hi, I dont know if you know how to help me or if I am reaching the right place but I just bought a 1997 Blazer Lt and noticed the back "Right" side is a INCH higher then the back "Left" side. I brought my truck in for a suspension check and I asked the guy about it and he said there is a way to adjust that up and down. I know a INCH doesnt seem like a major problem but I know its like that and its really bothering me now. Thanks for your time :)

Originally posted by siberiantiger23
...I asked the guy about it and he said there is a way to adjust that up and down... :)

Well? How do you do it?