Rep Power is how many points of 'rep' the user can give to other users.
To move the Rep, find this code in your postbit_legacy template and move it where you want:
HTML Code:
<vb:if condition="$show['reputation']">
<span class="postbit_reputation" id="repdisplay_{vb:raw post.postid}_{vb:raw post.userid}">{vb:raw post.reputationdisplay}</span>
</vb:if>
You may have to modify the CSS a bit.