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/**
 * woocommerce_single_product_summary hook
 *
 * @hooked woocommerce_template_single_title - 5
 * @hooked woocommerce_template_single_price - 10
 * @hooked woocommerce_template_single_excerpt - 20
 * @hooked woocommerce_template_single_add_to_cart - 30
 * @hooked woocommerce_template_single_meta - 40
 * @hooked woocommerce_template_single_sharing - 50
 */

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', 15);