As of patch 6.0.2, you can use this NPC to enter Dragon Soul even if you are above level 85. It will not make a group for you, but you can manually group with friends or queue solo.
"Dragon Soul: Characters above level 86 can now solo-queue for Dragon Soul on Raid Finder difficulty by speaking with Auridormi outside of the entrance to Dragon Soul in Caverns of Time."
As of patch 6.0.2, you can use this NPC to enter Dragon Soul even if you are above level 85. It will not make a group for you, but you can manually group with friends or queue solo.
"Dragon Soul: Characters above level 86 can now solo-queue for Dragon Soul on Raid Finder difficulty by speaking with Auridormi outside of the entrance to Dragon Soul in Caverns of Time."
http://us.battle.net/wow/en/blog/15682579#raid_dungeon