Can I adjust my position or scratch an itch while I am hypnotized?
Yes! Please do!
Get comfortable, clear your throat, scratch, sneeze, do what you need to do to get it out of your system and relax completely.
Each thing you do to be more comfortable will let you go deeper and there's a rule of thumb in hypnosis:
"The deeper you go, the better you feel. The better you feel, the deeper you go."