I always like to have the add to card button underneath the price ( I mean there is where you buy)
How to Setup Snippet
enable and go!
remove_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_add_to_cart', 30 );
add_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_add_to_cart', 10 );