1. My business is selling crystals, regression therapy, books, personal development healing and meditation classes (I am sure that it is Yin activity even though it is for profit). Maybe someone could confirm (otherwise yin would be #1 and yang would be #5... Opposite directions East vs. West)?
I believe Marie would still classify that as a Yang activity. If you are certain that it is yin, why not give it a try and see if it works? You can always switch if necessary.
2. When placing the register/cash till, should the counter/till be in a positive direction and be facing one of the best 4 directions for the business? I feel as though this is correct.
Yes, ideally it should also be in one of your personal positive directions, or the good direction of whoever is manning the till. However, the direction for the business is more important in Marie's system.