It's probably done for the most part, but airlock activity does not equal fermentation. It'll spend at least a week more fermenting the last little bit out and re-pitching won't change that. I'm not even sure why you'd want to re-pitch: it's doing its job and there isn't anything wrong, except the excessive temperature which will make your beer taste like apples or bananas.
Originally Posted by pfgonzo
Though at 80, your irish red is gonna smell like an apple green.
Funnily enough, that's exactly what happened to my first batch, also an Irish Red. Was not great. Was not horrible either. If you can't get temps down any further than 80 deg in the summer, brew some Saisons - they love the heat.