I don't have mine anymore but I'm pretty sure it can't be turned off completely. I remember reading (before I got mine) how it was very annoying that by just touching the screen you could move the AF point/area by mistake.
I did find this very annoying, and couldn't fid any way to turn this feature off, although you can disable the touch to take the shot feature IIR.
I found the camera a bit too sluggish to use and sent mine back, but the IQ was good and if it wasn't for having a Canon S110 I would have kept it.