MZ means you are a carry of alpha one antitripsone. I am also one.
If you don't smoke you will be OK. If you smoke you really have to stop.
If you have children they can also have it.
"Normal" O2 sat is 98%. Docs don't really care until it drops below 96% and some below 93 or 94%. You and on the cusp and should talk to your doctor about this sometime this week. Hypoxia is not an issue until the mid 80%'s, so you are ok for now, but it does sound like your meds need to be tweeked.
Take care and feel better.