Why are actions like cash withdrawal, pin change, mini statement kept on the right hand side of an ATM screen? (Most of the time)
It is because of physical buttons. ATM screen were not always touch screens and physical buttons were required to operate the same. The easiest way to do that was to give physical buttons on Right side.
Case for not going with other sides:
Left: Well, 70 to 95% people are right handed. But still, many ATMs have physical buttons on left-side or both sides (same options as right-side in most cases to cover for both Left handed and Right handed people) but majority is right-side.
Top: Hand hides the screen (No mouse here) and same viewing angle as the the screen is not maintained.
Bottom: Viewing angle? Hierarchy?
So, the screens with right side navigation are either following the same convention or designers made it like that(might have theirs own reasons).
Note: Not all screens have right side navigation now as they are basically touch screens.