Right now I'd use a corner to corner rectangle because you can type in the size.

.select corner to corner rectangle
.click start point
.type: 1.2 TAB -1.1 enter
.make circle at corner of rectangle.
.delete rectangle



For the future you could have an expansion of the move tool that adds x,y,z co-ordinates like this:



There could also be an absolute option to move to specific x,y,z co-ordinates rather than relative. I think this is in keeping with the existing interaction and interface but gives precise placement a bit more easily than at the meoment.

Michael, what do you think? Is this possible to do?