Not an answer to your question, but according to this, at most about 1 in 200 people are at least at +7 SD if the distribution is unimodal and symmetric (unimodal for the theorem to apply, symmetric so you can divide by 2). 200 seems like a uselessly low number, so I'm now regretting having pointed people at that theorem previously. :-)

ETA: though, even the useless 1 in 200 bound seems like an unrealistically high level of reasoning ability for priests.