My eyeball are more outward than others. Is this a sign that I have exophthalmic?

Perhaps. If you mean they bulge forward, then perhaps. It may be one eye or both eyes. A history of thyroid disorder may be relevant. Some people just have naturally bulgy eyes and this can be seen from old photos. Va visit to an ophthalmologist can help clarify some of this and the amount of proptosis can be measured and tracked.