Dear sherif bakr,
If you chose main-left-right is default in Administrator -> Extensions -> Template Manager -> sj_plus - Default -> Layouts -> Default Layout
Please go to your_site\templates\sj_plus\layouts\main-left-right.xml and find:
<position class="span3" data-tablet="span4" type="feature">@logo</position>
<position class="span3" data-tablet="span4" data-mobile="span4" style="none" type="modules">social</position>
<position class="span3" data-tablet="hidden" data-mobile="hidden" style="none" type="modules">search</position>
<position class="span3" data-tablet="span4" data-mobile="hidden" style="none" type="modules">contact</position>
=>
<position class="span3" data-tablet="span4" type="feature">@logo</position>
<position class="span9" data-tablet="span8" data-mobile="span8" style="none" type="modules">social</position>
Thanks!