The Exit Up Left 444 sign has an arrow on the left hand side of the sign which is pointing towards the top left corner. This can mean to go straight on, but it could also indicate that a person should head up and then left for their nearest exit.
If placed in the right position, this sign will make sense to people and provide helpful assistance on how they are able to leave the building. As it is photoluminescent, it will also continue to glow if there are no lights.
Fixing requires anything as simple as sticky pads, 'No-nails' type adhesive or double-sided tape.