There are a few reasons why your cat may be putting his paws up on your wall.
Your cat may be putting his paws up on the wall to stretch. Your cat probably stands tall on his hind legs and stretches his paws as far up on the wall as he can reach.
Your cat may also be doing this to mark his territory by leaving his scent on the wall. Cats have sweat glands on the underside of their paws. They use the glands to leave their scent on things in order to mark their territory. When you cat rubs his paws on something, he is probably sending the message to other cats that the object belongs to him.
It is also possible that your cat puts its paws up on the wall to get closer to you and to get your attention. If you cat meows before, during, or after putting his paws on the wall, he is probably trying to communicate with you. Your cat probably wants you to pick him up or give him affection.
Hopefully your cat is not scratching the wall when he puts his paws up. If he is scratching, he is probably trying to leave his scent on the wall to mark his territory. You can try to stop the behavior by introducing a scratching post. If you already have a scratching post for your cat, you can try to redirect the behavior to the scratching post when he puts his paws up on the wall.