The best way to do that is to go to the folder that contains all the files for your site . For example if the folder is named " site1 " go to it form your cpanel copy all the files to your Public_html folder
one way to do that is once you locate the folder that has your site files and you are looking at them ,
click on select all to select all the files or if you do not see select all
click on the first file in the folder it should be highlighted
then scroll down to the very last file of the folder
press the shift button on your keyboard and click the last file
now everything should be highlighted.
if not repeat the process again
until everything is highlighted .
right click
and click on copy
on the little popup window on the bottom
you should see copy file to
make sure the folder you're copying the files to is
/public_html
then click on the copy files button on the lower right corner of the popup window .
all of your files should now be in the pulic_html folder
you need to now change your configuration.php file
right click on and click on edit once the popup window opens click on edit again
it should open in your browser
look for the code line that says :
public $live_site = 'http://vivendishop.com';
if your domain name has a /folder
remove it and save
that should do it hope that works
for you