You would need to edit the USERCP template. The html/code for showing the reputation is:
<vb:if condition="$show['reputation']">
<!-- ############## NEW REPUTATION ############## -->
<div class="block" id="latest_reputation">
<h2 class="blockhead">{vb:rawphrase latest_reputation_received} ({vb:rawphrase x_points_total, {vb:raw bbuserinfo.reputation}})</h2>
<ol class="blockbody settings_form_border" id="reputationlist">
{vb:raw reputationcommentbits}
</ol>
</div>
<!-- ############## END NEW REPUTATION ############## -->
</vb:if>
It should be located right above {vb:raw template_hook.usercp_main_pos6} in that template.
To change the number of latest rep. received that is displayed, you can edit the Number of Reputation Ratings to Display option under User Reputation Options