If you want to change the layout on your site with left – main – right, you can follow with my solution below
+ Open templates/ja_university/etc/layouts/default.xml file
find and change
<blocks name="middle" colwidth="25">
<block name="content-mass-top">content-mass-top</block>
<block name="right1">position-7</block>
<block name="right2">position-5</block>
</blocks>
to
<blocks name="middle" colwidth="25">
<block name="content-mass-top">content-mass-top</block>
<block name="left1">position-7</block>
<block name="right2">position-5</block>
</blocks>
+ Layout change to 1280px you can change it from here
Open templates/ja_university/etc/profiles/default.ini file
find and change
screen_fixed_width="980"
to
screen_fixed_width="1280"
Once done to clear cache from admin area