Create a folder outside your public_html(Document root) through your cpanel ex. project1
Upload all your laravel folders to project1 except "public" folder.
Copy "public" folder to "public_html" default root folder of your domain.
Then open index.php in "public" folder (inside public_html) and change
require DIR.'/../project1/bootstrap/autoload.php';
$app = require_once DIR.'/../project1/bootstrap/app.php';