Old Will mentions property that has been replaced by another property

My father made a will when he was 60 years old. The will states that I will be the heir to ALL his Immovable property INCLUDING property X. My father is now 80 years old and has not made any other will. But in the last 20 years, he sold property X & from the proceeds purchased property Y and property Z. In the event of my father's passing away, will I still be the legal heir to all his immovable property (which now includes Y and Z, but not X)? Note: Property X was not an ancestral property.