Bluebirds: Another Chance?

I ordered and received a raccoon baffle which is the black thing in the above picture. It supposedly prevents raccoons from being able to climb up to the bird house and rob me of bluebirds. I also took the time to put metal strapping across the back to hold the bird house firmly on the post and prevent it from being drug down to lower heights or rotate in the wind. Hopefully this will solve our problems we've had the last couple years.

Thirty minutes after I hung it up, I saw a female bluebird (I think as they are mostly brown) fly over and check it out. It actually went inside for a minute before flying off again. Our neighbor who owns the birdhouse and who had bluebirds the same age as ours, had his fledge and already has another nest built in his with two eggs as of writing this. Maybe we too can also get another batch of bluebirds this season, this time successfully fledged. 

The only thing I am worries is that I drove the post a little deep and so the birdhouse is perhaps six inches closer to the ground than previously. It is 36 inches from the bottom edge of the birdhouse to the ground. How high can a large raccoon reach? 

I think I got my answer the following day when I discovered racoon paw prints all over the base of the racoon baffle. I'm not sure where they got the mud to apply to their paws and then to the baffle as it is terribly dry around here. But I am certain they weren't able to climb the baffle, at least not last night.