Move the primary navigation menu to the top of a page using the Genesis theme.

gistfile1.php

// Child theme setup function
function child_theme_setup() {
  // Remove the primary navigation from its current location
  remove_action( 'genesis_after_header', 'genesis_do_nav' );
  
  // Add the primary navigation to the top of the page
  add_action( 'genesis_before_header', 'genesis_do_nav' );
}

// Hook into genesis_setup
add_action( 'genesis_setup', 'child_theme_setup' );