Checking things over more closely I see that you didn't stir enough in the beginning. You got a SG of 1.086 after 2 days of active fermentation.2 more days and it had dropped to 1.066 or a difference of .020. Add that to the 1.086 and you get 1.106. The next two days it only dropped .012 so it may have actually been more than the .020 in the beginning or closer to 1.110. If that is the case, the alcohol may just be high enough to kill the yeast now and you won't get it lower. If you have mid 70's temps, those are high enough. Try some yeast nutrient and yeast energizer and give it a stir once. Then if fermentation doesn't start up again, you might have a fairly sweet wine.
Good luck with it. How does it taste now?