but when I look at the blockchain site, it appears to be empty. Why are bitcoins not showing on the site?
Based on the screenshots you provided, it appears that your Bitcoin Core is not yet fully synced with the network, as it is currently 6 years and 29 weeks behind. This may result in some of your wallet's In and Out transactions not being visible to you yet. Wait for the wallet to fully sync and you'll see then.
The address you provided does not match the transactions shown in the wallet. You probably mixed something up.