84' wall leans 5",17' out. Pulling to plumb, + columns, save wall?
If it is just a privacy wall, leave it be, unless you really want to spend a lot of bucks tearing it down and rebuilding it. If it is a retainer wall, with the dirt a lot higher on one side than the other, which is pushing the wall out, then it may need to be rebuilt if it is a relatively new wall and was not built properly to start with.