Wow! SG Jones, 85% -- that's interesting.
I have similar experience that supports much of the advice above: Years ago, we discovered that my 31 year-old (then) wife was (and is) left-eye dominant, altho very right-handed.
I think that trying to start someone shooting on their master eye side makes a lot of sense. However, in my wife's case, shooting (or doing much of anything else)left didn't feel right.
The tape dot Bill S suggested works well for her. A smear of grease on the left lens of her shooting glasses works better. The key is to smear, lightly, just the area the left eye is trying to look thru in the shooting position. The advantage of this minimalist approach is the ability to see, with binnocular vision, everything else.
