84 should be fine. In my experience, they like it anywhere from 75-85. Maybe keep an eye on moisture levels? I'm sure they're mostly fine, since bags/jars keep the spawn nice and moist.
You can break the spawn up in the bag a little and it will colonize faster. It probably should have been done earlier in the process. Uncolonized grains run a contam risk. I've had success just brushing the uncolonized grains off
Good luck!