It's not so much the height that matters as how long its been planted where it is - if its more than 18 months, it will be difficult to move successfully in terms of keeping the rootball intact and long roots from being broken. If its only been in a short while, dig it out and transfer to an appropriately sized container, if longer you will need a tarpaulin or something to wrap the roots in, and will certainly need 2 people to lift and wrap the plant for transport.