How strong would an Argentinosaurus be, if Paleontologists believe it to stand 70 feet tall at the head, and weigh close to 100 tons?

strong enough to trample and splat megafauna. You could kick a grown elephant like a soccer ball. Humans are considered relatively big animals [most animals are insect size], even a big vertebrate [most vertebrates are bird sized] but as argentinosaurus you could splat a human like an insect. Your biggest enemy would be hunger, you would be thinking about him 24/7

Not very strong at all. 70 feet isn't tall at all and 100 tons is nothing.