You can track your sales by logging into your CD Baby Artist Account and clicking the green "Sales & Accounting" button.
Please Note: It is important to remember that most of the digital partner sites only report sales to CD Baby every 1-3 months. iTunes, for example, sends CD Baby the monthly sales report about 4-6 weeks AFTER the month is finished.. meaning: artists won't see their January sales until the first week of March. Some companies report a full 3 months after the quarter is done - but CD Baby ALWAYS shows artist's everything they get as soon as they get it, adds the money to your account immediately, and pays you the next Monday (as long as you have reached your selected payment threshold).
You can update your payment threshold at any time by visiting the "Payment Info" section of your CD Baby Artist Account.