Hello, @Peter,
Simply go to the Dashboard >> XStore >> Theme OPtions >> Theme Custom CSS >> Global and then paste the below code at the bottom of the CSS box there.
@media(max-width:576px){ .woocommerce-product-details__short-description p{text-align:left !important;}}
Then save settings and check back to your site after clearing the browser cache.
Regards 8Themes Team.
