Selling : "Blockchain.info for dummies"
Kiddin:P
No man - there is no way to see a value in dollars calculated from a price when transaction was send.
EDITED: I was wrong
As you can read below
Wrong, It shows old value, just keep your mouse on dollar amount for 2 seconds. It will show a tooltip.
It would be too hard to implement into blockchain. Price is changing hour by hour..
EDITED: it was perhaps not easy, but they did it
If you need any help with Blockchain just ask us
someones will help you for sure (for free...)