What should my TSH level be is 10.4 to high or to low?

Too high. That indicates that you have hypothyroidism. You need to be seen and started on thyroid replacement.
High. All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Talk to the doctor who ordered the tests. Having said that, your TSH is high and it is a indication of poor thyroid function. You ought to see your doctor for replacement medication.