Accuracy wasn't raised for any of the 120 moves that had their power lowered. They are the same as they were in Gen 5.
Hydropump is 110/80. It was 120/80.
A list of all the moves that lost power:
Aura Sphere from 90 to 80.
Blizzard from 120 to 110. (Accuracy still 70)
Draco Meteor from 140 to 130.
Dragon Pulse from 90 to 85.
Fire Blast from 120 to 110. (Accuracy still 85)
Flame Thrower from 90 to 85.
Heatwave from 100 to 95.
Hurricane from 120 to 110.
Hydropump from 120 to 110.
Ice Beam from 95 to 90.
Leaf Storm from 140 to 130.
Meteor Mash from 100 to 90
Muddy Water from 95 to 90.
Overheat from 140 to 130
Surf from 95 to 90.
Thunder from 120 to 110.
Thunderbolt from 95 to 90.
That so far seems to be the debuffs...A lot of things got buffs too...like Gunk Shot stayed at 120 and moved to 80% Accuracy I think. Syncronoise moved from 70 BP to 120 BP.
https://www.serebii.net/xy/updatedattacks.shtml
That is all of the discovered changes so far.