Thanks for your help MrCATIA!

I can rotate the part now but how do I rotate an assembly? I am sorry I will not be able to upload the assembly as I am under a NDA but the previous designer fixed an axis at the the wrong edge of a cube and now the y-axis is pointing in the opposite direction. How do I change the point of origin and the direction of y-axis without recreating the geometry?

Thanks for your earlier reply again!