I'm no expert but imo you'll have a job on lifting a block in the middle if it's been laid correctly as mentioned below, each block is compacted into place.
Assuming you can lift them, ensure they are relaid correctly & compacted (not certain just using a mallet would be sufficient/possibly hire a small wacker plate?) using the correct materials.
It might be worth considering lifting more than is needed & mixing cement into the sand bed around the anchor.
My advice would be to research it before ploughing ahead and I know there are websites that give advice on laying block paving as I'm in the process of doing mine.
I found this site helpful
http://www.pavingexpert.com/
Good luck.