The HikaShop plugin for Google Analytics enables you to report every sale made on your website on your Google analytics account. You can access its options via the Joomla plugins manager. That's a great way to produce statistics on your sales.
The plugin is unpbulished by default and is only available in the Business edition of HikaShop. You can access its options via the plugins manager of Joomla.
Also, this plugin is for the e-commerce data of Google Analytics. You'll also need a Joomla Google Analytics plugin enabled on your website to transmit the rest of the Analytics data to your Google Account: http://extensions.joomla.org/extensions/site-management/analytics/site-analytics-google-based
Note that it can take several days before the sales are taken into account by Google Analytics so it's normal that you don't see anything in the Ecommerce tab of your GA account just after an order.
How can I create a new account? Just log into Google Analytics, go in the Admin menu, and in the left dropdown, you'll get a "Create a new account" link. On the next page, specify your website address and choose the appropriate currency.