Hello, @parshva,
Thanks for using our Theme and for contacting us.
In order to solve your issue simply go to the Dashboard >> XStore >> Theme Settings >> Theme Custom CSS >> Global and paste the below code at the bottom of the CSS box there.
.header-main-menu .nav-sublist-dropdown:not(.nav-sublist){top:75% !important;}
Then save settings and check back to your site after clearing the browser cache.
The result will appear like this: https://postimg.cc/SjyFw60p
Regards 8Themes Team.