Like others have said, if the machine is left homing, the needle will be to the left for the straight stitch, and you can't change that. One easy way to tell is on a zig zag machine - look for a knob/lever that will be for LMR - for needle position. If it does not have that, it's almost always going to be left homing.
What is that lever above the stitch selector for? It is not labeled for needle position so it might be part of what engages the cam stack for the fancy stitches.