[Messianic]

On live you had to be glower or above to bank, dunno if it's the same here. But yes, you could stand on the opposite side of the wall and rotate your camera to right click him (bank through the wall, similar to what you can do in NFP if you're kos to the guards but not the bankers). You can also do it with sneak if you're a class/race that has that ability.